Porsche 991 GT3 will get a 3.8-liter engine with 450 hp

Porsche is working hard on the all-new 911 (991) GT3 but insiders already spelled out the details of the new car. Set to make its debut at the 2013 Geneva Motor Show, the new Porsche 991 GT3 will get a normally aspirated 3.8-litre flat six and abandon the larger 4.0-litre powerplant used in the 997-generation GT3 RS 4.0.

According to Autocar, the new GT3 will deliver around 450 hp, with 15 hp more than the old model. This should offer a sprint from 0 to 100 km/h (62 mph) in 4.0 seconds and a top speed of almost 200 mph or 320 km/h. Moreover, the car is expected to be available with one transmission and we’re talking about a PDK seven-speed, dual-clutch automatic.

Although the PDK is heavier, the new GT will be lighter than the outgoing model, which had a kerb weight of 1395kg. In terms of design, the 991 GT3 will get a new body kit featuring wider air ducts, wider sills and flared wheel arches, 20-inch alloy wheels and the well-known rear exhaust that sits in the center. Furthermore, sources also confirmed a new GT3 RS that will get around 480 hp.